The 19-year-old, who has been with the Gunners since the age of 16, spent the first part of the season with League One outfit Oxford United, scoring twice in six league appearances.

"He is a player who is very skilled with the ball," said Eagles technical manager Dennis Bekking. "He can pass well and has an eye for the through-ball. With this he adds creativity to the midfield."

Crowley added: "My transition to the Netherlands is a very deliberate choice. Dutch football is known as technical and tactical football. That fits me. In League One, which I played with Barnsley and Oxford United, we use more of the long ball.

"I am an attacking-minded midfielder who likes to create opportunities for attackers. On the other hand I am very motivated to learn to provide more defensive support. I think Dutch football can help me become tactically strong."